We look at the division of 37871559 by 988 
The aim is to understand the frequency of 988 in 37871559.

Step 1:
3 divided by 988 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Include the next digit (7) from the dividend after 3, then repeat: 37 / 988

Advancing to step 2:
If we divide 37 by 988, we get 0 and a remainder of 37.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 37 after subtracting 0 from 37.
Append the next digit (8) from the dividend to 37 and continue with: 378 / 988

Moving on to step 3:
The number 988 fits into 378 0 times, leaving a remainder of 378.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 378, we end up with 378.
Fetch the next digit (7) from the dividend, attach it to 378 and continue: 3787 / 988

Moving on to step 4:
988 goes into 3787 3 times with a remainder of 823.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Deduct 2964 from 3787 and we're left with 823.
Include the next digit (1) from the dividend after 823, then repeat: 8231 / 988

Let's proceed to step 5:
988 can be fit into 8231 8 times, resulting in a remainder of 327.
Record the quotient 8 as the next digit in the result. 
Result so far: 38.0
Subtracting 7904 from 8231 leaves us with 327.
Include the next digit (5) from the dividend after 327, then repeat: 3275 / 988

Going ahead to step 6:
3275 divided by 988 is 3 with a remainder of 311.
The next digit of our result is 3. 
Result so far: 383.0
Deduct 2964 from 3275 and we're left with 311.
Bring next digit (5) of the dividend behind the 311 and repeat the process: 3115 / 988

Moving on to step 7:
If we divide 3115 by 988, we get 3 and a remainder of 151.
The number 3 becomes the next digit in our result. 
Result so far: 3833.0
Subtract 2964 from 3115 to get 151.
Grab the next digit (9) from the dividend, add it to 151, then carry on: 1519 / 988

Step 8:
988 can be fit into 1519 1 times, resulting in a remainder of 531.
Record the quotient 1 as the next digit in the result. 
Result so far: 38331.0
Deduct 988 from 1519 and we're left with 531.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5310, and continue the process.

Let's proceed to step 9:
If we divide 5310 by 988, we get 5 and a remainder of 370.
Put 5 as the next digit of the answer. 
Result so far: 38331.5
If we subtract 4940 from 5310, we get 370.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3700, and continue the process.

Step 10:
The number 988 fits into 3700 3 times, leaving a remainder of 736.
Put 3 as the next digit of the answer. 
Result so far: 38331.53
Subtract 2964 from 3700 to get 736.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7360, and continue the process.

On to step 11:
7360 divided by 988 is 7 with a remainder of 444.
Use 7 as the next digit of our solution. 
Result so far: 38331.537
If we subtract 6916 from 7360, we get 444.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4440, and continue the process.

Step 12:
The number 988 fits into 4440 4 times, leaving a remainder of 488.
Put 4 as the next digit of the answer. 
Result so far: 38331.5374
Subtracting 3952 from 4440 leaves us with 488.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4880, and continue the process.

Going ahead to step 13:
If we divide 4880 by 988, we get 4 and a remainder of 928.
Put 4 as the next digit of the answer. 
Result so far: 38331.53744
Subtract 3952 from 4880 to get 928.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9280, and continue the process.

The final result is 38331.53744 with a remainder of 0.000928.